Method of press-molding thermoplastic resins

Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...

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2643287, 425150, 425590, B29C 4556

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active

057955107

ABSTRACT:
A thermoplastic resin is molded by a press-molding method wherein a thermoplastic resin in a molten state is compressed to flow between a pair of female and male molds so as to be formed into a predetermined shape. A compression rate of the mold is controlled so that the following expression (1) is satisfied:

REFERENCES:
patent: 5057255 (1991-10-01), Sato et al.
patent: 5059364 (1991-10-01), Okubo et al.
patent: 5063008 (1991-11-01), Wenskus, Jr. et al.
patent: 5130075 (1992-07-01), Hara et al.
patent: 5252269 (1993-10-01), Hara et al.
patent: 5525285 (1996-06-01), Matsumoto

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